GEOS-5 Run-Time Characteristics for Heracles 5.2

AGCM Performance at various resolutions

Results for a 10-day AMIP-style simulations at 72 levels using MERRA2 GOCART aerosols, MERRA-2 ocean, and running Heracles-5_2 on Haswell CPUs
Resolution	CPUs (typical)	Timestep (sec)	Wall Clock (Hours)	Throughput (Days per day)	CPU Hours	Typical Data Volume (GB)	Notes
C12 (8-deg)	24	900	0.16	1380	5	4	Reynolds Ocean
C24 (4-deg)	96	900	0.20	1340	5	6	Reynolds Ocean
C48 (2-deg)	96	900	0.30	745	8	13
C90 (1-deg)	96	900	0.65	383	15	38
C180 (0.5-deg)	216	450	1.67	150	360	140
C360 (0.25-deg)	864	450	2.25	107	1980	530
C720 (14-km)	1536	225	8.15	26	12600	2090

Results for a 10-day AMIP-style simulations at 72 atmospheric levels and 40 ocean levels using MERRA2 GOCART aerosols running Heracles-5_2 on Haswell CPUs
Atmos Res	Ocean Res	CPUs	Timestep (sec)	Wall Clock (Hours)	Throughput (Days per day)	CPU Hours	Typical Data Volume (GB)	Notes
C90 (1°)	720x410(½°)	180	900	0.9		205	85

Layout NX	Layout NY	Total PEs	Total Time (sec)	Dynamics Time (sec)	Physics Time (sec)	Dynamics Percent	Physics Percent
6	36	216	1170	407	667	34.8%	57.0%
8	36	288	945	326	536	34.5%	56.7%
8	48	384	780	269	426	34.5%	54.6%
12	72	864	534	166	275	31.1%	51.5%